Macro for_each_sdmmc 

macro_rules! for_each_sdmmc {
    ($($pattern:tt => $code:tt;)*) => { ... };
}

Available on crate feature _device-selected only.

This macro can be used to generate code for each slot of the SDMMC/SDIO host driver.

For an explanation on the general syntax, as well as usage of individual/repeated matchers, refer to the crate-level documentation.

This macro has one option for its “Individual matcher” case:

Syntax: ($slot:ident, $idx:literal, $iomux:literal, [$($clk:ident)?] [$($cmd_in:ident)?] [$($cmd_out:ident)?] [$($data_in:ident),*] [$($data_out:ident),*] [$($cd:ident)?] [$($wp:ident)?] [$($card_int:ident)?] [$($data_strobe:ident)?] [$($rst:ident)?])

Macro fragments:

• $slot: the name of the slot (slot0, slot1).
• $idx: the zero-based slot index.
• $iomux: true if the slot’s clock/command/data signals are IO_MUX-routed.
• $clk, $cmd_in, $cmd_out, $data_in, $data_out: GPIO-matrix bus signal names (absent for IO_MUX-routed slots).
• $cd, $wp, $card_int, $data_strobe, $rst: auxiliary signal names, each present only when the slot routes that signal through the GPIO matrix.

Each optional signal is wrapped in brackets so the branch shape stays uniform: a set signal appears as [SIGNAL], an absent one as [].